Skin Ache or Stomach Ache - how do we know?

I have chronic gastritis and sometimes get a stomach ache & upset. I also have GERD. But, I've also had times where the stomach medicine doesn't help at all, and the skin over my upper digestive area is so sore. So are the bones (ribs). I'm beginning to think it is nerve endings in my skin from FM.

Anyone else get this aching skin pain? I don't think any internal organs are that close to the skin. If I pinch an inch it hurts!